| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [verb] [been] [adj] [noun] | 120 |
|
| 2 | [vb mod] [verb] [been] some [noun] | 73 |
|
| 3 | [modal v] [verb] [been] some [noun] | 73 |
|
| 4 | must [verb] [been] some [noun] | 34 |
|
| 5 | must [verb] [be] some [noun] | 34 |
|
